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Solvent-free method of preparing Co-MOF material based on cobalt-containing double metal oxide

A bimetallic oxide, solvent-free technology, applied in the field of MOF material preparation, can solve the problems of large amount of solvent, difficult product separation, complicated steps, etc., and achieve the effects of simple operation, high yield and short process.

Active Publication Date: 2017-07-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the existing Co-MOF preparation methods, such as large solvent usage, cumbersome steps, and difficult product separation, the purpose of the present invention is to provide a simple and convenient operation, short cycle, and solvent-free preparation of Co-MOF. method

Method used

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  • Solvent-free method of preparing Co-MOF material based on cobalt-containing double metal oxide
  • Solvent-free method of preparing Co-MOF material based on cobalt-containing double metal oxide
  • Solvent-free method of preparing Co-MOF material based on cobalt-containing double metal oxide

Examples

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Effect test

Embodiment 1

[0027] 200mg hollow nano-CoSnO 3 Mix with 200mg 2-methylimidazole, grind for 30min, put it in a 100mL reaction kettle, seal it, raise the temperature to 160℃ at a heating rate of 5℃ / min and let it stand for reaction for 10h. After the reaction, cool to obtain a grape red solid , ground to obtain about 350 mg Co-MOF. figure 1 It is its XRD picture, it can be seen that the Co-MOF prepared by this method has the same characteristic peaks as the standard Co-MOF (ZIF-67), indicating the reliability of this preparation method. figure 2 It is its scanning electron microscope photo. It can be seen that the obtained Co-MOF is composed of many nanocubes with a diameter of about 200-250nm, and a layer of film-like substance is covered on the surface, and its thickness is about 5-10nm. Connect all nanocube bridges together. image 3 shows the TEM image of the resulting Co-MOF, where CoSnO 3 The hollow nanostructure is still there, and its wall thickness is 20-30 nanometers, and a laye...

Embodiment 2

[0033] 180mg CoSb 2 o 4 Mix with 90mg 2-methylimidazole, grind for 30min, place it in a 50mL reactor, seal it, raise the temperature to 140℃ at a rate of 5℃ / min and let it stand for reaction for 8h. After the reaction, cool to obtain about 250mg Co -MOF, the specific surface area of ​​the obtained MOF material is 168.5m 2 g -1 , much larger than the precursor CoSb 2 o 4 The specific surface area, the thickness of the MOF layer on the surface is 3-5nm, and the particle size range is 500-1000nm.

Embodiment 3

[0037] 100mg CoMnO 3Mix with 500mg 2-methylimidazole, grind for 30min, place it in a 50mL reactor, seal it, raise the temperature to 180℃ at a heating rate of 5℃ / min and let it stand for 6h. After the reaction, cool to obtain about 350mg Co -MOF, its particle size distribution is mainly around 200nm, TEM shows that the surface MOF thickness is in the range of 15-25nm, and the specific surface area is 668.5m 2 g -1 .

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Abstract

The invention discloses a solvent-free method of preparing a Co-MOF material based on a cobalt-containing double metal oxide. The method comprises the following steps of: grinding and mixing the cobalt-containing double metal oxide with a ligand compound; putting the mixture in a sealing kettle; and performing a reaction at 80-300 DEG C in the sealing kettle to obtain the Co-MOF material which is large in specific surface and has mesopores and micropores at the same time. The method is simple to operate, short in period and high in yield, provides a novel MOF material preparation path, and greatly lowers the production cost of the MOF material, so that industrial production is facilitated.

Description

technical field [0001] The invention relates to a preparation method of a Co-MOF material, in particular to a fast and convenient method for preparing an MOF material under a solvent-free condition by using a cobalt-containing double metal oxide; it belongs to the technical field of MOF material preparation. Background technique [0002] Metal-organic framework materials (Metal-Organic Frameworks, MOFs) are a new type of porous materials with high specific surface area, good adsorption performance and good thermal stability, which are coordinated by metal ions and multifunctional organic ligands. Due to the diversification of metal ions and organic ligands, it has the characteristics of large specific surface area, porosity, and various structures, and has good development prospects in the fields of gas adsorption, storage, and catalysis. Therefore, the preparation and performance research of materials has become one of the most attractive topics at present. Due to the high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00
CPCC08G83/008
Inventor 纪效波邹国强侯红帅邱晓清
Owner CENT SOUTH UNIV
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